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Self-Diagnostic System

Body Control Module (BCM) is equipped with a self-diagnostic system, which detects system Diagnostic Trouble Codes (DTCs) or abnormalities. When a malfunction occurs, BCM will store a DTC. See BCM DTC DEFINITIONS  . Malfunctions are recorded as history/intermittent failures or as current failures. Current DTCs indicate BCM has detected a fault which is currently present. A history DTC indicates that BCM has previously detected a malfunction that is not currently present.

A scan tool can be used to retrieve and clear DTCs. The scan tool also has several features that can be used to help locate an intermittent condition. When scan tool is used for system tests, it will display values actually seen or commanded by various systems (i.e., BCM, PCM). This will usually include the following types of information:

BCM DTC DEFINITIONS

DTC(1) Description
B0608  BCM Power Moding Error
B1003  RFA Programming/Diagnostic Mode Message Not Received
B1007  BCM Internal Memory Malfunction (Write Error)
B1009  BCM Internal Memory Malfunction (Checksum Error)
B1015  VIN Information Error
B1339  Battery For Door Lock Circuit (Open)
B1344  Courtesy Lights Battery Feed Circuit (Open)
B1349  Door Lock Actuator Ground Feed Circuit (Open)
B1477  RAP Relay Circuit (Short To Ground Or Open)
B1478  RAP Relay Circuit (Short To Voltage)
B1482  Courtesy Lights Circuit (Short To Ground)
B2533  Foglight Switch Circuit (Short To Voltage)
B2552  Backup Lamp Circuit Low
B2553  Backup Lamp Circuit High
B2559  Theater Dimming Ground Circuit (Open)
B2602  DRL Control Module Circuit (Short To Ground Or Open)
B2603  DRL Control Module Circuit (Short To Voltage)
B2612  Passenger Compartment Dimming No. 1 Circuit Low
B2613  Dim Potentiometer Circuit High
B2618  Passenger Compartment Dimming No. 2 Circuit High
B2747  Performance Shift Switch Circuit (Short To Ground Or Open)
B2753  Horn Relay Circuit (Short To Voltage)
B2818  Low Tire Pressure System Reset Circuit Low
B2957  PASS-Key(R) II Detection Circuit (Short To Ground)
B2958  PASS-Key(R) II Detection Circuit (Short To Voltage Or Open)
B2960  PASS-Key(R) II Detection Circuit (Out Of Range)
B2961  Key-In-Ignition Fault
B3102  RFA Link Circuit (Short To Ground)
B3103  RFA Link Circuit (Short To Voltage)
B3106  RFA Link Parity Error
B3127  Driver's Door Unlock Circuit (Short To Ground Or Open)
B3128  Driver's Door Unlock Circuit (Short To Voltage)
B3031  PASS-Key(R) II Programming Mode Active
B3267  Decklid Output Relay (Short To Ground Or Open)
B3268  Decklid Output Relay (Short To Voltage)
U1016  Loss Of Class 2 Communication With PCM
U1040  Loss Of Class 2 Communication With ABS
U1096  Loss Of Class 2 Communication With IPC
U1255  Loss Of Class 2 Serial Data Fault (General)
U1300  Class 2 Circuit (Short To Ground)
U1301  Class 2 Circuit (Short To Voltage)
(1) For DTCs not listed, repair appropriate system as necessary.